drawing for larger version
drawing for larger version
field was being grazed by sheep with young lambs, so plant
location was no problem. Acid sandy soil, well liked by docks.
Likely cause of problem was contaminated feed fed to over-wintered
taken: The field was divided into manageable areas,
by marking out tramlines with a vehicle. Work started
on the southern boundary fence. Visits to the field were
recorded carefully, along with working hours and numbers
of docks pulled and loaded into tractor bucket and trailer.
Each member of the workforce removed 99 docks per hour,
and was able to keep up this rate all day.
Over 12000 docks were removed at a cost of just over £100
per acre. Pay was £7. 50p. per hour. This cost might have
been less if the work had been continuous instead of comprising
Docks in grassland & Arable (Ref. D.030). See also
type: sandy / acid (requires lime)
status: Long term temporary grass, used for spring
grazing and summer conservation.
of RIP work : 27 April / 14th May 2004
Docks removed (including seedlings),: 10,183.
taken to pull & remove: 102.5 pulling-hours
used: L-Dog & NO8 Fork. (a L-D tool with NO1b
fitted was also available for awkward roots). After removal,
the docks were thrown into piles & counted into a
loading into a trailer.These are to be shredded &
composted with FYM.
Density: 1414 per acre.
196 per 25 square yds.)
of surface observable plant clusters would appear
of pulling: 99.34 Docks per working hour
@£7.50 per hour Cost per acre = £106.77p
@£8.00 per hour Cost per acre = £113.88p
@£10.00 per hour Cost per acre = £142.36p
to these costs for a follow up or walking of the field,
to pick up missed or emerging plants.
work took 9 man-hours, produced another 1242 small
plants, and brought the total number of docks removed
.. Cost per acre = £7 to £8.
mowing follow-up (JUNE 30th) 564 plants removed
in 8hrs @ £60.(50% curled Dock & 50% from broken
roots or fragments.)
value can be put on clearing dock roots from this arable
field can now be used for conservation, without fear of
spreading dock seed through animal feed. This would mean
no feeding in field racks, and all FYM to be hot composted.
field can be grazed, without any need for topping (up
to three times) to control seeding docks
field is now fit to plough, rotovate, and cultivate without
chopping up roots.
field could now be expected to grow a valuable potato
crop, for which extensive rotavation is required. If the
docks had not been removed, two years of cropping
would see those multiple rotovated root sections become
large and successful plants.
field might then require a year of fallow, with extensive
dragging and root removal. Considerable time time and
energy would be needed, and a year of cropping lost.
we have gained 12 to 15 tons of root biomass. This
is going to be shredded, and incorporated into a compost,
based on wheat-straw sheep bedding. We intend to make
three samples of compost (using one similar area of bedding),
and get them analysed. Dr John Zarb is overseeing this
work, and expects the root rich compost to have some qualities,
maybe appropriate in certain areas of horticulture. It
is almost inevitable that the incorporation of dock roots
will add value of some sort.